Friends of the Earth (FoE) Scotland wants individuals to be able to install small-scale solar panels and wind turbines without needing planning permission.
"We have previously convinced Scottish ministers of the need for planning rules to ensure that microgeneration is installed on all new schemes over a certain size," said FoE Scotland greener homes officer Liz Murray.
"It is now vital that the government removes the red tape that surrounds installation of microgeneration on existing buildings so they can generate green energy on site," she added.
A government-commissioned study from Heriot-Watt University has called for microrenewables to be brought under the auspices of the General Permitted Development Order.
A government spokesman said last week that it will shortly be consulting on the study's recommendations.